The aim of this study is to develop a valid and reliable data collection tool that teachers can evaluate the ability of principals to manage generational differences in the schools. The study was conducted with 380 teachers who work in Nigde. In this context, item pool was created and presented to the experts. According to expert's opinions and pre-application, the last version of scale was created and applied to 380 teachers. Based on the KMO and Bartlett values, the data set was found suitable for Exploratory Factor Analysis. The number of factors was determined as one, based on eigenvalues and scree plot. According to the factor loadings of the items, values ranged from 0.871 to 0.722. As a result, a structure consisting of 19 items and one factor. Based on the fit indices obtained from Confirmatory Factor Analysis, the model was found perfectly compatible with the model. The structure found with EFA was confirmed by CFA. The Cronbach alpha value calculated as 0.971 which indicates that the scale is reliable. As a result, it can be said that "Managing Generational Differences in Schools Scale" which composed of 19 items and one dimension is a valid and reliable data collection tool.